GPS网平面坐标转换的约束平差

GPS Constrained Ajustment of Horizontal Coordinate Transformation

建立了ＧＰＳ网平面坐标转换的约束平差模型，给出了对转换后ＧＰＳ网的精度进行评定的协方差阵，从序贯平差的角度解释了经约束平差后ＧＰＳ网精度降低的原因。通过对一实例的计算分析，提出一些在进行ＧＰＳ坐标转换的数据处理过程中应注意的问题。

This paper introduces a constrained adjustment model of horizontal coordinte transformation of GPS network, gives the covariance matrix for evaluating the accuracy of that and describes why the accuracy of GPS network is reduced in the constrained adjustment.